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CVE-2018-11564

CWE-79Published: June 2, 2018· Updated: Jun 17, 2026

4.8

CVSS v3.1

Official Description

Stored XSS in YOOtheme Pagekit 1.0.13 and earlier allows a user to upload malicious code via the picture upload feature. A user with elevated privileges could upload a photo to the system in an SVG format. This file will be uploaded to the system and it will not be stripped or filtered. The user can create a link on the website pointing to "/storage/poc.svg" that will point to http://localhost/pagekit/storage/poc.svg. When a user comes along to click that link, it will trigger a XSS attack.

Technical Analysis

CVE-2018-11564 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2018-11564. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.High

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected Vendors & Products

pagekit1 product(s)

pagekit

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://ruffsecurity.blogspot.com/2018/05/my-first-cve-found.html

ADVISORYhttps://packetstormsecurity.com/files/148001/PageKit-CMS-1.0.13-Cross-Site-Scripting.html

ADVISORYhttps://www.exploit-db.com/exploits/44837/

ADVISORYhttp://ruffsecurity.blogspot.com/2018/05/my-first-cve-found.html

ADVISORYhttps://packetstormsecurity.com/files/148001/PageKit-CMS-1.0.13-Cross-Site-Scripting.html

ADVISORYhttps://www.exploit-db.com/exploits/44837/

All References (6)

→

http://ruffsecurity.blogspot.com/2018/05/my-first-cve-found.htmlExploit · Third Party Advisory

→

https://packetstormsecurity.com/files/148001/PageKit-CMS-1.0.13-Cross-Site-Scripting.htmlExploit · Third Party Advisory · VDB Entry

→

https://www.exploit-db.com/exploits/44837/Exploit · Third Party Advisory · VDB Entry

→

http://ruffsecurity.blogspot.com/2018/05/my-first-cve-found.htmlExploit · Third Party Advisory

→

https://packetstormsecurity.com/files/148001/PageKit-CMS-1.0.13-Cross-Site-Scripting.htmlExploit · Third Party Advisory · VDB Entry

→

https://www.exploit-db.com/exploits/44837/Exploit · Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2018-11564

CVSS Score4.8 / 10

SeverityMEDIUM

WeaknessCWE-79

CISA KEVNo

ExploitPOC

Affected1 vendor(s)

PublishedJun 2, 2018

Related CVEs (CWE-79)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2018-11564 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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